Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4JB callsign genealogy
Currently held by DAVIS, FRANK B
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KZ4JB's current licensee, walking backwards.
- Baker Jr, James WGAgranted 2024-02-27cancelled 2025-09-12
Successor callsigns
Callsigns held now by people who previously held KZ4JB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KZ4JB, oldest first.
- DAVIS, FRANK B NC2011-12-20 → cancelled 2023-12-21
- Baker Jr, James W GA2025-09-12 active